Messages in this thread | | | Date | Wed, 7 Apr 2004 08:03:30 +0200 | From | Andrea Arcangeli <> | Subject | Re: -mmX 4G patches feedback [numbers: how much performance impact] |
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On Tue, Apr 06, 2004 at 10:25:48PM +0200, Andrea Arcangeli wrote: > I'm using DOUBLE. However I won't post the quips, I draw the graph > showing the performance for every working set, that gives a better > picture of what is going on w.r.t. memory bandwidth/caches/tlb.
Here we go:
http://www.kernel.org/pub/linux/kernel/people/andrea/misc/31-44-100-1000/31-44-100-1000.html
the global quips you posted indeed had no way to account for the part of the curve where 4:4 badly hurts. details in the above url.
Please cross check my results on your hardware (I used a 2.5Ghz xeon, 1G of ram, and benchs run fresh after boot with all ram still free). Numbers are perfectly reproducible for me, and they make perfect sense too. 2.6.5-aa4 is the same as 2.6.5-aa3 for this benchmark (though I'll upload 2.6.5-aa4 in a few hours). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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